import * as m1 from './m1.js'
import * as m2 from './m2.js'  // vue框架下可以省略不写 .js
import m3 from './m3.js'       // 但是这里不能省略不写

console.log(m1)
console.log(m2)
console.log(m3)
console.log(m1.star)
m1.sing('哈哈')
console.log(m2.star)
console.log(m3.username)
console.log(m3.age)
m3.coding()